Making a block diagram

Recall how in Chapter 2, Exploring Robot Building Blocks – Code and Electronics, and throughout the book, we've created block diagrams showing the robot we built there. You can represent any robot in this way. This diagram is where you would have a block for each input and output and then create controller and interface blocks to connect with them. Don't worry about the diagram being perfect; the main point is that the picture conveys which parts you'll connect to others. It's also quite likely that the initial diagram will need some change as you build a robot and come across constraints you were not aware of.

Here are two stages of a block diagram for SpiderBot:

Figure 19.2 – SpiderBot block diagram stages

In Figure 19.2, I initially knew going in that each leg had three motors, but not a lot else. So, I drew those blocks in, along with the distance sensor I want it to have and a Wi-Fi connection...